Chronic Traumatic Encephalopathy and Alzheimer's disease Lead Investigator: Gary McDonald Institution : UCL E-Mail : garygmmcdonald@gmail.com Proposal ID : 670 Proposal Description: Investigating the link between TBI and age of onset of cognitive decline, CTE, TBI and AD using t-test analysis. Association between demographics and risk factors with CTE. Identifying CTE group and comparing characteristics with AD group. Identifying link between CTE and other diseases such as PD and ALS.